WPBV Radio
The Briefing
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Before You Give an AI Agent Access to Your Inbox
Reading mail and sending it are different permissions. Start with the job you actually want done.
10 People Shaping Fintech
Ten people whose work helps explain where payments, digital banking and financial infrastructure are going.
What Happens After You Tap Your Card?
The terminal's approval is one step in a longer journey from a payment request to settled funds.
AI
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Retrieval-Augmented Generation Explained: How AI Answers From Your Documents
How RAG tools search your documents before answering, and how to check what they say.
Context Window Explained: What an AI Tool Can Keep in View
What fills an AI tool's context window, how tokens are counted and why long chats lose track.
Why AI Hallucinates: The Mechanics Behind Confident Wrong Answers
How AI tools learn and how they are scored push them to guess. Where the errors come from and how to catch them.
Payments & Fintech
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Interchange Fee vs MDR: Which Part of a Card Fee Is Which
The MDR is the whole charge for accepting a card; interchange is the issuer's slice inside it.
3D Secure Explained: Why Some Card Payments Ask for a Second Step
Why your bank asks you to approve some online card payments, when it can skip the step, and who pays for fraud.
Chargeback Fee: What a Disputed Card Payment Costs a Merchant
The chargeback fee Stripe, PayPal and Square charge, and the other costs of a disputed card payment.
Crypto & Web3
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Self Custody vs Exchange: Keys, Recovery and Risk
Compare key control, recovery and provider risk before choosing where to hold crypto assets.
Proof of work vs proof of stake: how the two systems agree
Proof of work spends computation; proof of stake puts validator capital at risk.
Ethereum Layer 2: what gets cheaper?
Moving execution changes the cost of a transaction. It also adds details about bridges, withdrawals and trust.
Apps & Software
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Two-Factor Authentication Methods Compared: SMS, Apps and Security Keys
SMS codes, app codes, push prompts and security keys compared, and which one stops a fake login page.
Browser Extension Permissions to Check Before You Install
Which extension warnings reach furthest, how to limit site access, and what to check when an update asks for more.
Browser Release Channels: Stable, Beta, Dev and Canary
What Stable, Beta, Dev, Canary and Nightly channels mean, and how to test them without risking daily work.
Tech & Internet
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BGP Explained: How Routes Spread
How BGP spreads routes, why bad announcements travel, and what RPKI origin validation checks.
How DNS Works, and Why It Shows Up in So Many Outages
How a name becomes an address, why caching makes failures uneven, and the three ways DNS breaks in real outages.
Availability Zones Explained: Regions and Failures
A second zone helps only when data, capacity, dependencies and recovery routing can use it.
Startups & Ventures
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Pro Rata Rights Explained: What Early Investors Keep
How a pro rata right lets an investor keep its stake in the next round, with worked numbers.
Liquidation Preference Explained, With Worked Numbers
Who is paid first when a startup is sold, worked through 1x, 2x and participating terms at four exit prices.
SAFE valuation cap explained: conversion and dilution
A SAFE valuation cap affects conversion. It is not the company's current valuation or guaranteed ownership.